Last month we got our first look at the upcoming promotion for the LEGO Marvel Super Heroes Avengers Tower (40334) and it looks like LEGO has accidentally revealed the details on how to get the set. According to the Offers & Promotions page, it will be available from April 19 to May 2 with purchases of $75 or more in LEGO Marvel Super Heroes products, while supplies last. It shouldn’t be that hard to reach the limit and there are also rumors that the Spider-Man: Far From Home sets will be available starting on April 22 so that makes it even easier to get the Avengers Tower set. Thanks to Frank for the heads up.
On a side note, since the LEGO Store Calendars do not show the gift-with-purchase promotions anymore, it may be to your advantage to bookmark the Offers & Promotions pages since they may start telling you all of the promos for the month.